JP3872133B2 - Packaging machine - Google Patents

Description

従って、ステップ２では、上記式（５）を実行後、式（６）を演算処理し、求めたフィルム長Ｌを記憶する。
【００５４】
次に、ユーザーのほしい情報が残り時間であるか否かを判断し、ユーザから与えられた命令が残り時間の場合には、ステップ４に飛び、ステップ２で求めたフィルム長Ｌから残り時間を求め、その算出結果を表示装置に対して出力する（ＳＴ４，ＳＴ５）。
【００５５】
この時、残り時間の算出処理は、以下のようになっている。すなわち、速度制御装置３８では、原反ロール１５から引き出された帯状フィルム１６の移動速度が、目標移動速度Ｖになるように各モータを制御している。従って、この後も上記目標移動速度Ｖで帯状フィルム１６が引き出されると仮定し、下記式（７）を実行することにより求める。
【００５６】
残り時間＝Ｌ／Ｖ …（７）
一方、上記ステップ５の処理を実行後、或いは、ステップ３の分岐判断でＮの場合には、ステップ６に飛び、ユーザーのほしい情報がその原反ロールで製造可能な製造個数であるか否かを判断し、ユーザから与えられた命令が製造個数の場合には、ステップ７に飛び、ステップ２で求めたフィルム長Ｌから製造個数を求め、その算出結果を表示装置に対して出力する（ＳＴ７，ＳＴ８）。
【００５７】
この時、製造個数の算出処理は、以下のようになっている。すなわち、現在稼働中の包装機のカット寸法（１個の包装体を製造するために必要とするフィルムの長さＬ0 ）は、その包装機の運転開始時に初期データとしてセットされているので、そのセットされた値Ｌ0 とステップ２で求めたフィルム長Ｌを、下記式（８）に代入することにより、求める。
【００５８】
製造個数＝Ｌ／Ｌ0
そして、上記ステップ８の処理を実行後、或いはステップ６の分岐判断でＮの場合にはステップ１に戻り次の処理に備える。
【００５９】
なお、上記した実施の形態では、残り時間と残り製造個数を求めることができ、しかも、各値はユーザーからの命令に基づいて選択的に実行できるようにしたが、本発明はこれに限ることはなく、例えば、ユーザーからの命令に従い選択表示するのではなく、常に両者を算出しともに出力するようになっていても良い。また、算出処理は両者とも行うが、出力表示はユーザーから指令を受けたもののみを行うようにしても良いなど種々変更実施が可能である。さらには、残り時間と製造個数の一方のみしか求められないようになっているものでも良い。
【００６０】
さらにまた、ステップ２で求めた残りのフィルム長を出力・表示するようになっていても良い。その場合に、フィルム長のみを算出し・出力するものでもよく、或いは、上記した実施の形態並びに各変形例のように他の情報とともに或いはそれらと選択式に出力・表示できるようになっいてもよい。
【００６１】
さらには、上記したセンサからの情報取得並びに各演算を行うタイミングは、一定の間隔で常時行うようにしていてもよく、或いは、ユーザーからの命令を待って行うようになっていても良い。そして、常時演算処理等している場合には、その演算結果の表示・出力も常時行うようにしていてもよく、或いは演算結果を常時書き換え記憶しておき、表示装置４９への出力は、ユーザーからの命令・要求を待って行うようにしてもよく、種々の方式を採ることができる。
【００６２】
なおまた、本実施の形態では、ロール径算出部５５で求めた直径のうち、包装機の稼働開始時に求めた直径Ｒ0 を速度制御装置３８に転送するようにしている。そして、速度制御装置３８では、与えられた原反ロール径データＲ0 を運転開始時の原反ロール径として初期設定し、そのロール径に基づいて帯状フィルム１６の移動速度が目標速度になるような原反ロール１５の回転速度を求め、それになるように第４の駆動モータ４０の回転速度を求め、その求めた速度で回転駆動する。これにより、回転開始直後から誤差の少ない安定状態で帯状フィルムの包装機への供給が行え、目標値に到達するまでの時間も短時間で行える。
【００６３】
次に、上記した実施の形態に基づいて、その作用を説明する。まず、フィルムのカット寸法，被包装物の高さ・長さ，単位時間あたりの製造個数等の所定の可変データを速度制御装置３８に入力する。そして、上記カット寸法と単位時間あたりの製造個数から帯状フィルム１６の移動速度（目標値）を求める。また、上記カット寸法や移動速度は、速度制御装置３８を介して残り量算出部４８へも転送される。
【００６４】
なお、上記各データの入力は、ピロー包装装置全体の駆動制御のために必要なもので、原反ロールの送出し方法のためには、少なくともフィルムのカット寸法と単位時間あたりの製造個数があればよい。また、係るデータを入力せずに、帯状フィルム１６の移動速度（目標値）を直接入力するようにしてもよい。
【００６５】
次に、速度制御装置３８からの制御命令に従い、第２，第４の駆動モータ３３，４０をそれぞれ所定の回転速度で一定量回転させ、その後停止させる。この時、第２の駆動モータ３３の回転にともなう帯状フィルム１６の引き出し速度の方が、第４の駆動モータ４０の回転にともなう原反ロール１５からの帯状フィルムの送出し速度よりも早くなるように設定する。これにより、実際の帯状フィルムの移動速度は、補助ローラ２８，センターシーラ２９等ですべりが発生し、速度の遅い第４の駆動モータ４０に基づく帯状フィルムの送出し速度になり、帯状フィルムは弛むことなく移動する。
【００６６】
この移動時に、第１距離計測装置５１の両ローラ５１ａ，５１ｂも追従して回転し、それにともない所定のパルス（パルス数Ｎ）が出力され、また原反ロール１５の回転と同期して回転軸４３が回転し、磁性材５６が磁力検知器５７の前を通過する都度第２距離計測装置５３から所定のパルス（パルス数ｎ）が出力される。
【００６７】
そして、ロール径算出部５５では、与えられたｎ，Ｎに基づいて、上記した式（１），（２）を実行後、式（３）を実行し、その原反ロール径Ｒ0 を算出し、速度制御装置３８に転送する。これにより、開始当初の原反ロール径の算出処理が終了する。
【００６８】
なお、この算出時に帯状フィルムを移動させるために駆動させる第２，第４の駆動モータ３３，４０の駆動タイミング（上記一定量の回転）は、たとえば一定時間でも良く、或いはいずれかのパルス数ｎ及びまたはＮが予め設定したしきい値を越えた時でも良く任意の値を設定できる。そしてしきい値処理する場合には、ｎ，Ｎの両者を同一のしきい値と比較しても良く、或いはそれぞれに適したしきい値を設定しても良い。また、ｎまたはＮの一方のみを予め比較対象とし、その値が一定のしきい値を越えた時まで駆動するようにしても良く、任意の値を設定できる。
【００６９】
そして上記移動速度（目標値）から補助ローラ２８，センターシーラ２９の回転速度、すなわち、それを駆動するための第２の駆動モータ３３の回転速度を求める。さらに、速度制御装置３８は、初期設定された原反ロール径Ｒ0 と移動速度（目標値）に基づいて第４の駆動モータ４０の運転開始当初の回転速度を算出する。そして、各部の位置合わせ（初期設定）が終了したならば、第２の駆動モータ３３を、上記求めた回転速度で等速回転駆動させる。また、帯状フィルム１６が移動速度（目標値）で搬送されているとして第１，第３の駆動モータ２７，３５も所定のタイミングで増減速駆動する。さらに、第４の駆動モータ４０も上記算出結果に基づいて回転させる（移動速度よりも若干遅くなるような速度に設定する）。これにより、引出された帯状フィルムが製袋器１８までの間で弛むことがなくなる。
【００７０】
そして、第４の駆動モータ４０が回転駆動すると、それにともない原反ロール１５も所定速度で回転し、原反ロール１５から帯状フィルム１６が送出される。また、これと同時に第２の駆動モータ３３が等速回転してそれに連携する補助ローラ２８等が等速回転するため、上記送出された帯状フィルム１６が等速度で製袋器１８を通って筒状フィルム１９に製袋されながら内部に被包装物２０が供給され、そのままさらに前進することによりセンターシーラ２９にてフィルム重合端部位がシールされ、エンドシーラ３０で横方向にシール・カットされて包装体３４が製造される。
【００７１】
またこの運転中の帯状フィルム１６の送出し速度は、第４の駆動モータ４０を増減速することによりそれに追従するように制御される。よって、上記した速度制御装置３８により、原反ロール１５の巻径が小さくなるのに応じて第４の駆動モータ４０の回転速度を増加させることにより、一定速度で帯状フィルム１６を送出す。しかも、係る速度制御は、リアルタイムで常時行われているため、スムーズに（段差無く）第４の駆動モータ４０の回転速度を変動させることができるので、帯状フィルム１６の移動速度は、目標値付近でほぼ一定値が保たれる。
【００７２】
このように本実施の形態では、本発明の要部である残り量を算出する装置の一部であるロール径検出装置（第１，第２距離計測装置５１，５３並びにロール径算出部５５）を利用して、運転開始当初の原反ロール径Ｒ0 を検出する機能を付加したため、開始時の第４の駆動モータ４０の回転速度を係る径に応じて最適な値に設定できるので、開始時から第４の駆動モータ４０による原反ロールからの帯状フィルムの送出し量と、第２の駆動モータ３３による帯状フィルムの引き出し量（ともに単位時間あたり）がほぼ等しい所定の関係に維持され、帯状フィルム１６は最初から所定のテンショが過不足なく加わる。
【００７３】
よって、一方のモータに過電流が流れたり、帯状フィルムに必要以上のテンションが加わったりすることがなく、所望の状態で包装処理が行える。そして、開始する都度原反ロール径の検出が行われるため、終業時，メンテナンス時その他の理由により包装装置を停止し、その後、再運転する場合や、使用途中の原反ロールを装着する場合など、原反ロール径が未使用時のものから小さくなっているように、正確な直径が不明な場合でも、確実に所望の状態で装置の稼働を行える。
【００７４】
なお、本実施の形態では、制動装置のような大型な設備が不要となり、原反ロール１５から製袋器１８までの間には、プーリ１７のように嵩の張らない部材のみが存在するので、実装された包装装置全体を低くし、小型化を図ることができる。
【００７５】
上記したように、通常の包装機の稼働時では、安定して帯状フィルム１６が送り出され、初期設定した条件で包装体が製造されていく。ここで本発明では、例えば使用中の原反ロール１５のロール径が小さくなってきて、交換の時期が近づいてきたとすると、係る交換処理を行うユーザーは、図示省略の入力装置を介して残り時間の表示命令を入力する。
【００７６】
すると、ロール径算出部５５で求められたその時のロール径Ｒに基づいて、残り量算出部４８では、ステップ１〜ステップ５までの処理を順次実行し、残り時間を求め、それを表示装置４９に出力する。そして、ユーザーは、その残り時間を確認し、比較的短ければその場で待機し、使用中の原反ロールから帯状フィルムがすべて引き出されるのを待って次の原反ロールに交換を行う。一方、残り時間が比較的な害場合には、一旦その場を離れて他の仕事を行い、交換の時間が来る頃に再度包装機のそばに戻ってきて交換処理を行う。このように残り時間がわかるので、無駄な時間が無くなり、残り時間に応じた仕事・処理を行うことができるので生産性が向上する。
【００７７】
また、残り時間と終業時刻或いはその包装機の稼働停止予定時刻との関係から、現在使用中の原反ロール或いはそれとすでに用意している（包装機のそばに持ってきている）予備の原反ロールで、足りるか否かを判断し、足りない場合には、必要な本数だけ原反ロールを持ってくることができる。これにより、過不足無く原反ロールを包装機のそばに一時保管することができ、必要以上に持ってくることによる終了後の保管場所への再移動処理が不要となり、作業効率が良くなる。
【００７８】
一方、現在使用中の原反ロールで製造しているのと同一の包装体について必要な製造個数が与えられている場合に、ユーザーは、図示省略の入力装置を介して残りの製造個数の表示命令を入力する。
【００７９】
すると、ロール径算出部５５で求められたその時のロール径Ｒに基づいて、残り量算出部４８では、ステップ１，２，６，７の処理を順次実行し、残りの製造可能な製造個数を求め、それを表示装置４９に出力する。そして、ユーザーは、その製造個数を確認し、現在使用中の原反ロールで要求されている数の包装体を製造できるか否かを判断し、足りない場合には原反ロールを持ってきておく。一方、足りる場合には、その場を一旦離れたのし語と等を行い、所定時間経過後に包装機の所に戻ってくると、要求された個数だけ包装体が製造されている。つまり、原反ロールがなくなり、製造不能で一時停止となることがない。
【００８０】
なお、上記した実施の形態では、第１，第３の駆動モータ２７，３５を夫々、所定のタイミングで増減速するようにしたが、本発明はこれに限ることなく、第１の駆動モータ２７は等速回転するものでもよい。すなわち、実施の形態では被包装物２０が製包機１８に供給される際にはそれと接触する筒状フィルム１９と同速度で移動させるようにしたが、被包装物２０が固く、筒状フィルム１９との速度差による接触抵抗によってもくずれたりしないような場合には、上記のように第１の駆動モータ２７を等速回転させて被包装物供給装置２２の搬送速度を一定にすることにより、制御系を簡易にすることができる。
【００８１】
なお原反ロールの弧の長さを検出する手段としては、上記した実施の形態に限ることなく、例えば図６に示すように、第２距離計測装置と同様に、エンコーダ付きの回転ローラ５１ａを回転軸４３の外周面に対して、所定圧力で当接させるとともに、回転自在に保持し、回転軸４３の回転に追従して回転するようにしてもよい。これにより、回転軸４３が回転すると、その回転軸４３の外周面の移動距離（弧の長さ）に応じたパルス数がロール径算出部へ送られ、第１距離計測装置と同一の測定原理に従い、弧の長さが求められる。
【００８２】
そして、本発明における測定する弧の長さとは、上記した各実施の形態のように具体的な数値（Ｘｃｍ，Ｙｍｍ等）で求めてもよいが、係る具体的な数値を算出せずにエンコーダから出力されるパルス数などの長さに対応する値も含む概念であり、フィルムの移動距離の測定についても同様である。そして、係る場合には比例に基づく演算処理も、パルス数等の間接的なデータの状態で実行することになる。
【００８３】
なお、上記変形例及び上記した実施の形態では、原反ロール１５を装着する回転軸４３を回転体とし（回転軸と回転体とを兼用させた）、その外周面の弧の長さを測定するようにしたが、本発明はこれに限ることなく、この回転軸４３に別途円板状の回転体を装着し、その回転体の弧の長さを計測するようにしてももちろん良い。
【００８４】
なお上記した実施の形態では、実装する包装機として上記した実施の形態では横ピロー包装装置に適用した例について説明したが、縦ピロー包装装置，横三方包装装置や四方包装装置等使用する包装フィルムが原反ロールから連続して引出されるものであれば種々の包装機に適用することができる。
【００８５】
【発明の効果】
以上のように、本発明に係る包装機では、現在使用中の原反ロールの残り量に関する情報を知ることができる。従って、残り量のデータが残り時間の場合には、原反ロールの径が小さくなってきてもその包装機のそばで待機する必要が無くなり、その残り時間に応じた処理を他の場所で行うことができる。よって、工場全体での生産性が向上する。また、逆に原反ロールからすべての帯状フィルムが引き出される前に包装機のそばに戻ってくることができるので、供給する帯状フィルムが無くなって包装機が一時停止してしまう時間が無くなるか可及的に抑制され、包装機の稼働効率が向上する。
【００８６】
また、残り量のデータが、フィルム長や製造個数の場合には、使用中の原反ロールで要求された個数の包装体を製造できるか否かの判断が簡単かつ正確に行え、予備の原反ロールを過不足無く準備でき、必要以上の予備の原反ロールの移動による無駄な労力を削減できる。
【００８７】
さらに、上記した残り量に関するデータは、原反ロールのロール径に基づいて行うので、使用途中の原反ロールであってもよく、また、使用開始当初から常時監視しなくても良いので、制御並びに汎用性が向上する。
【００８８】
そして、請求項５のようにすると運転開始後の制御においては、原反ロール側で帯状フィルムの送出しを制御できるので、駆動モータを増減速するとそれに追従して原反ロールの回転速度も増減速し、駆動モータを停止すると原反ロールの回転も停止させることができる。よって、従来のように慣性力により原反ロールが回転し続けることがなく、原反ロールに対する大掛かりな制動装置が不要となる。
【００８９】
そして、帯状フィルムの送出しに伴う原反ロール径の減少に合わせて駆動モータの回転を所定の比率で徐々に増速していくと、帯状フィルムを等速度で送出すことができる。
【図面の簡単な説明】
【図１】本発明に係る包装機の一実施の形態を示す図である。
【図２】本実施の形態の要部である原反ロール付近を示す一部拡大断面図である。
【図３】本実施の形態の要部である第１距離計測装置を示す一部拡大断面図である。
【図４】本実施の形態の動作原理を説明する図である。
【図５】残り量算出部の機能を説明するフローチャートである。
【図６】第２距離計測装置の別の実施の形態を示す図である。
【図７】従来技術を示す図である。
【符号の説明】
１５ 原反ロール
１６ 帯状フィルム
２８ 補助ローラ（供給する手段）
２９ センターシーラ（供給する手段）
３３ 第２の駆動モータ（供給する手段）
３８ 速度制御装置（制御手段）
４０ 第４の駆動モータ（駆動モータ）
４８ 残り量算出部（残り量算出手段）
４９ 表示装置（出力装置）
５１ 第１距離計測装置（ロール径検出手段）
５３ 第２距離計測装置（ロール径検出手段）
５５ ロール径算出部（ロール径検出手段）[0001]
[Technical field to which the invention belongs]
The present invention relates to a packaging machine.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a packaging machine such as a horizontal pillow packaging machine, for example, as shown in FIG. To form a tubular film 4. On the other hand, on the carry-in side of the bag making device 3, an article supply device 5 is installed, and the article 6 is conveyed at predetermined intervals and sequentially supplied into the tubular film 4. And it conveys sequentially in the state in which the to-be-packaged product 6 was included in the cylindrical film 4, and the film superposition | polymerization end of the cylindrical film 4 is sealed with the center sealer 7 in the middle of the conveyance, and also in the end sealer 8 The package 9 is manufactured by sealing and cutting the space between the packages 6 of the tubular film 4 in the horizontal direction.
[0003]
Then, the belt-like film 2 is fed from the raw roll 1 by using a feed roller 10 having a pair of rollers for sandwiching the drawn belt-like film 2 from both sides thereof. That is, one roller 10a constituting the feed roller 10 is connected to the drive motor 11, and the other roller 10b is brought into a free state. As a result, when the drive motor 11 rotates at a constant speed, one of the rollers 10a also rotates at a constant speed, so that the belt-like film 2 is pulled out at a constant speed. Following this, the web roll 1 is also indirectly given a rotational force, allowing the strip-shaped film to be pulled out.
[0004]
For the drive control of each of the above parts, for example, the system disclosed in Japanese Patent Laid-Open No. 63-281911 is used. That is, the other two drive systems (the drive system of the article supply device 5 and the drive system of the end sealer 8) are controlled on the basis of the drive motor 11 that pulls out the belt-like film 2. More specifically, the band-shaped film 2 serving as the reference is pulled out at a constant speed as described above, and the interval between the cut marks formed on the band-shaped film 2 is detected to be different from the predetermined interval (cut mark pitch). In this case, the speed of the article supply device 5 (conveyance speed of the article to be packaged), the rotational speed of the end sealer 8 and the meshing timing are increased / decreased so that the motors serving as the drive sources of all the drive systems are synchronized. Yes. Thus, since the moving speed of the strip | belt-shaped film 2 becomes a reference | standard of the drive control of the whole packaging apparatus, if the moving speed fluctuates, it cannot be operated normally. Therefore, it is necessary to pull out the belt-like film at a constant speed as described above.
[0005]
By the way, when the belt-like film 2 is sandwiched and pulled out by the feed roller 10 as described above, the original roll 1 rotates following the withdrawal of the belt-like film 2, so that a certain inertia force is generated. Yes. And if a difference arises between the rotational speed accompanying the inertia force, and the drawing-out speed of the original fabric roll 2, there exists a possibility that slack may arise in the strip | belt-shaped film 2. FIG. When the belt-like film is loosened in this way, for example, when the bag is passed through the bag making device 3 of the packaging device, the belt-like film 2 meanders, and the center seal portion is not formed at a desired location. As a result, the final package may be defective.
[0006]
Therefore, a braking device that brakes this rotation is provided on the original roll 1, and the tension is applied to the belt-like film 2 by braking the rotation of the original roll 1, thereby preventing the occurrence of the slack. .
[0007]
[Problems to be solved by the invention]
By the way, as a matter of course, when one original fabric roll 1 is pulled out, it is necessary to mount the next original fabric roll 1. However, in the conventional packaging machine, since the remaining time required until all of the used rolls 1 are pulled out cannot be known, the rolls are replaced when the roll diameter of the roll 1 becomes small. The person who waits until all the rolls in use are exhausted in front of the apparatus, and then performs the replacement process. Therefore, no other work can be done while waiting, and the efficiency is poor.
[0008]
In addition, a spare web roll is usually prepared on the side of the packaging machine so that when all the web rolls attached to the packaging machine are pulled out, it can be immediately replaced. Therefore, if the remaining time is not known as described above, when the packaging machine is operated until a certain time such as the end of work time, the currently installed original roll or the spare original roll already prepared is sufficient. Whether or not is unknown. Therefore, in order to ensure safety, a large number of spare rolls will be prepared. However, if the rolls are not used in the end, the rolls brought will be wasted and the labor required to move the rolls will be reduced. In addition to incurring a loss, it is a double loss in view of the fact that other work could be done during the movement of the original roll.
[0009]
Similarly, since the number of packages that can be manufactured with the currently used original roll is also unknown, for example, it is sufficient to use the original roll that is currently used in order to achieve a certain production target number. I didn't know if I needed to bring a roll. Therefore, a large number of spare rolls are prepared for safety, and the same problem as described above occurs.
[0010]
On the other hand, since the total length of unused raw fabric rolls is known, when the number of manufactured units per unit time and the cut dimensions (the film length used to manufacture one package) are determined, The time required to finish using the raw roll and the number of manufactured rolls are required. Therefore, when the packaging machine is continuously operated, it is possible to predict the approximate remaining time by measuring the time from the start of operation. However, an unused original fabric roll is not always installed, and an already used original fabric roll may be installed by a predetermined amount. In such a case, the same problem as described above also occurs.
[0011]
The present invention has been made in view of the above-mentioned background, and the object of the present invention is to solve the above-mentioned problems, know the remaining amount of the raw roll, and the remaining time and the number of production (packaging) possible It is to provide a packaging machine with good working efficiency.
[0012]
[Means for Solving the Problems]
  In order to achieve the above-described object, the packaging machine according to the present invention wraps an object to be packaged conveyed at predetermined intervals using a belt-like film continuously fed from a raw roll, and the film In a packaging machine that manufactures a package by sealing and / or cutting a predetermined portion, a roll diameter detection unit that detects a roll diameter of the raw roll, and the original based on the roll diameter detected by the roll diameter detection unit A remaining amount calculating means for determining the remaining amount of the belt-shaped film wound on the anti-roll, and an output device for outputting a calculation result by the remaining amount calculating means.For example, as the roll diameter detecting means, for example, a first distance measuring device that directly or indirectly measures a moving distance of the belt-shaped film sent out by the rotation of the original fabric roll, and a rotation synchronized with the original fabric roll. A second distance measuring device that directly or indirectly measures the arc length of the rotating body, and movement distance data and arc length data respectively measured by the first and second distance measuring devices; And a roll diameter calculating unit that calculates the raw roll diameter based on the output.(Claim 1).
[0013]
  The remaining amount is specifically the film length (Claim 2), the remaining time (Claim 3), or the remaining production quantity (Claim 4).To do.
[0014]
  Further, as a specific configuration of the packaging machine, for example, a drive motor capable of increasing / decelerating control that gives a rotational force to a rotating shaft on which the original fabric roll is mounted, and a moving speed position of the belt-shaped film delivered from the original fabric roll Control means for controlling the drive motor so as to have a constant speed may be provided.5).
[0015]
Here, the roll diameter is a concept including a radius, although the diameter is shown in the embodiment. In the embodiment, the output device is a display device. However, the present invention is not limited to this, and may be a printing device such as a printer, or may be a voice device. Furthermore, even if it is not integrated with the packaging machine, it may be a device that transfers data to various output devices at other remote locations by wireless or wired connection, and the form is not limited. In the case of such transfer, it is not always necessary to include a transfer destination display device or the like, and only a device that transfers predetermined data is included in the output device in the present invention.
[0016]
  Moreover, it is a claim as a packaging machine.5However, the present invention is not necessarily limited to this, and for example, a type in which various types of conventional brake devices as shown in FIG. 7 are mounted. But you can.
[0017]
The roll diameter of the raw roll is obtained at a certain timing during use. And it relates to the remaining amount of the film such as the film length from the roll diameter, the remaining time in which the original roll can be operated (the time until all the strip films are delivered from the original roll), and the number of manufactured films. Ask for data. Then, the obtained result is output to the output device.
[0018]
As a result, the user can know information about the remaining amount of the original roll in use, so that even if the roll diameter of the original roll is reduced, the user is waiting near the packaging machine or more than necessary. There is no need to bring a spare stock roll. Therefore, productivity is improved.
[0019]
In the embodiment, the film length is obtained by obtaining the number of turns of the original roll from the film thickness, but the specific calculation algorithm is not limited to this. In the embodiment, the length of the film constituting the raw roll and the remaining time and the number of manufactured pieces are calculated. However, actually, the film is already sent from the raw roll and reaches the end seal device of the packaging machine. The film exists only up to the distance. Therefore, when the remaining amount is obtained more accurately, correction / correction based on the already sent amount is performed on each value obtained in the embodiment. The present invention includes both cases where the correction is performed and those where the correction is not performed.
[0020]
  furtherIn the roll diameter detecting means, the total distance of movement of the belt-like film when the belt-like film is fed out by rotating the roll is measured by the first distance measuring device, and the rotation angle of the rotating body is set as the central angle. The length of the arc is measured with the second distance measuring device.
[0021]
The moving distance measured by the first distance measuring device is equal to the length of the arc of the fan whose center angle is the rotation angle rotated at that time and whose radius is the radius of the original roll. Moreover, the length of the arc of the rotating body rotated at this time is detected by the second distance measuring device. Furthermore, the diameter (diameter) of the rotating body is known and constant.
[0022]
Therefore, if the rotation angle of the rotating body and the rotation angle of the original roll are equal, the ratio of the arc length and diameter of the rotating body, the arc length of the original roll (the length of the fed film), and the original Since the ratio of the diameter of the anti-roll is equal, the original roll diameter is calculated by performing predetermined four arithmetic operations using these three data.
[0023]
  Claims5According to the packaging machine specified in No. 1, the feeding speed of the belt-like film is controlled so as to follow it by increasing and decreasing the driving motor linked to the original fabric roll. Therefore, the belt-like film is sent out at a constant speed by increasing the rotational speed of the drive motor as the roll diameter of the original roll is reduced by the control means. In addition, since the rotation of the original fabric roll follows the rotation of the drive motor in this way, when the drive motor is decelerated or stopped, the rotation of the original fabric roll also decelerates / stops according to the change, Since it does not continue to rotate due to the inertial force, a conventional braking device is also unnecessary. And the strip | belt-shaped film sent out as mentioned above is supplied to the predetermined position of a packaging machine by the supply means at a predetermined | prescribed speed, and is used as a packaging film.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an example of an embodiment of a packaging device according to the present invention. As shown in the figure, the belt-like film 16 wound around the raw roll 15 is wound around a plurality of pulleys (fixed pulleys, tension pulleys, etc.) 17 and led to a lower bag-making machine 18 to produce the film. By passing through the bag device 18, a cylindrical film 19 is formed in a cylindrical shape.
[0025]
On the carry-in side (upstream side) of the bag making device 18, a to-be-packaged supply device 22 that sequentially supplies the to-be-packaged material 20 into the bag making device 18, that is, the tubular film 19 is installed. The packaged article supply device 22 is configured by attaching push fingers 26 at regular intervals to an endless chain 25 provided between a pair of drive sprockets 23 and a driven sprocket 24, and is linked to the drive sprockets 23. The first drive motor 27 is rotationally driven in response to the rotational force. The first drive motor 27 is composed of a motor that can control the rotational speed of the servo motor or the like so as to freely increase and decrease the speed.
[0026]
Further, an auxiliary roller 28, a center sealer 29, and an end sealer 30 are arranged at predetermined positions on the carry-out side (downstream side) of the bag making machine 18, and a carry-out conveyor 32 is installed further downstream of the end sealer 30. .
[0027]
The auxiliary roller 28 is composed of a pair of rollers that sandwich the overlapping end portion of the cylindrical film 19 from both sides thereof, and is fed to the cylindrical film 19 by a raw film feeding device according to the present invention described later. A conveying force at a speed slightly higher than the moving speed of 16 is applied, a constant tension is applied to the belt-like film 16, and the film is prevented from loosening.
[0028]
The center sealer 29 is composed of a pair of flat rotating rollers (at least one is heated). The overlapping ends of the tubular film 19 are sandwiched between the rotating rollers and heated to heat-bond the overlapping ends. It is supposed to be. The rotational speed of the center sealer 29 is also slightly faster than the moving speed of the strip film 16.
[0029]
The auxiliary roller 28 and the center sealer 29 are connected to the second drive motor 33, and both rotate synchronously at the same speed. The second drive motor 33 is connected to the speed control device 38 together with the first drive motor 27, and its speed is controlled. The second drive motor 33 may also be composed of a motor capable of increasing and decreasing speed, such as a servo motor, in order to provide versatility. However, if it is not necessary to change the rotation speed during the operation of the packaging device, You may comprise with a normal motor.
[0030]
Further, the end sealer 30 is provided with a top sealer 30b attached to a rotary shaft 30a arranged opposite to each other in the vertical direction, and both of them rotate in synchronism with each other and the top sealers 30b abut each other with the tubular film 19 therebetween. It is like that. Furthermore, a heater and / or a cutter are built in the predetermined top sealer 30b. Thereby, when both the top sealers 30b abut against each other, a predetermined portion of the tubular film 19 is heated and fused, and is cut with a cutter, whereby the package 34 is manufactured. Then, the package 34 is carried out by the carry-out conveyor 32. The end sealer 30 is also rotationally driven by a third drive motor 35 linked to one rotary shaft 30a, and the third drive motor 35 can also be controlled to increase / decrease such as a servo motor. It consists of a simple motor.
[0031]
Further, the fourth drive motor 40 is linked to the original fabric roll 15, and a rotational force in a predetermined direction is directly applied to the original fabric roll 15 so that the belt-like film 16 is sent out at a predetermined speed. That is, as shown in FIG. 2, the original fabric roll 15 is configured by winding the belt-like film 16 around the paper tube 41 many times, so that the paper tube 41 is cantilevered by the bearing 42. The rotary shaft 43 is inserted into and fixed to the rotary shaft 43, and is integrated with the rotary shaft 43. The raw roll 15 is sandwiched and fixed from both sides by a stopper 44 provided on the rotating shaft 43.
[0032]
A sprocket 45 is fixed to one end of the rotating shaft 43, and the rotational force of the fourth drive motor 40 is transmitted to the rotating shaft 43 via a power transmission chain 46 that is stretched over the sprocket 45. As a result, when the fourth drive motor 40 rotates, the rotating shaft 43 and thus the original fabric roll 15 rotate. The fourth drive motor 40 is driven to rotate based on the control signal from the speed control device 38 described above.
[0033]
The fourth drive motor 40 and the rotary shaft 43 are not connected via the power transmission chain as described above, but the output shaft of the drive motor is connected directly to the rotary shaft or via a gear or the like. May be.
[0034]
Since it comprised as mentioned above, when the 4th drive motor 40 is rotated, since the rotating shaft 43 and the original fabric roll 15 rotate at a predetermined speed, the strip | belt-shaped film 16 is sent out continuously in connection with it. And since the 4th drive motor 40 and the original fabric roll 15 are interlock | cooperating, if the 4th drive motor 40 increases / decreases, the rotational speed of the original fabric roll 15 will also increase / decrease.
[0035]
Accordingly, even when the fourth drive motor 40 is suddenly stopped or decelerated while rotating at a certain speed (high-speed rotation), the original roll 15 is caused by inertial force as in the prior art. It does not continue high-speed rotation, but stops or decelerates as it is. As a result, the fourth drive motor 40 also exhibits the function of a braking device, so that a conventional large braking device is not necessary. Further, by accurately controlling the rotation speed of the fourth drive motor 40, the rotation speed of the raw roll 15 can be controlled, and the fourth drive motor 40 that controls the feeding speed of the strip film 16 can be controlled. It can be adjusted by controlling. The belt-like film 16 sent out in this way is supplied to the packaging machine side at a predetermined speed by the pulling force from the auxiliary roller 28 and the center sealer 29 that are rotationally driven by the second drive motor 33. .
[0036]
By the way, the belt-like film 16 is continuously sent out by directly applying a rotational force to the original roll 15 with the above-mentioned configuration, but the raw roll diameter of the original roll 15 is gradually reduced with this feeding. Therefore, if the rotation speed of the fourth drive motor 40 is made constant, the feeding speed of the belt-like film 16 is gradually reduced, and the moving speed of the belt-like film 16 serving as a reference for driving control of each part of the horizontal pillow packaging apparatus is It will not be constant. Therefore, in order to send the belt-like film 16 to the bag making machine 18 (packaging device) side at a constant speed, it is necessary to increase the rotational speed as the raw roll diameter decreases. Therefore, the speed control device 38 performs control to gradually increase the rotation speed.
[0037]
As specific control, when the belt-like film is moved and supplied at a predetermined speed, the raw roll diameter gradually decreases at a constant rate (the belt-like film is moved to the packaging machine side at a constant speed). The degree of reduction of the roll diameter is determined by the elapsed time from the start of work), and a map and table of the speed with the elapsed time from the start of work set in advance according to the degree of reduction The control can be performed so as to increase the speed of the fourth drive motor with reference to such a map.
[0038]
Further, if the feeding speed of the belt-like film accompanying the rotation of the raw roll 15 is equal to the belt-like film drawing speed accompanying the withdrawal of the auxiliary roller 28 and the like, the second and fourth drive motors 33 and 40 are heavily loaded. However, when a predetermined current is supplied, a desired rotation speed can be obtained. However, if both speeds change, one drive motor (which has a lower rotation speed) Since braking force is applied, in order to rotate the other drive motor to a predetermined speed, it is necessary to supply a current higher than a normal supply current. On the other hand, when a predetermined current is supplied to one drive motor side, a rotational force is applied from the other drive motor, so that the motor rotates at a speed equal to or higher than a normal rotation speed. Therefore, the current change (deviation from the target value (normal value)) and the rotation speed change (deviation from the target value (normal value)) are monitored, and they are 0 (the above-mentioned drawing speed and delivery speed). Or the respective drive motors can be feedback-controlled so as to have a predetermined value (giving a certain difference between the drawing speed and the sending speed). Furthermore, the moving speed and moving distance of the belt-like film may be monitored, and feedback control may be performed on each drive motor so that it matches the target value, and various control methods can be taken.
[0039]
Although the speed control for the first and third drive motors is also performed by the speed control device 38, since such control is conventionally known, the processing flow is specifically omitted.
[0040]
Here, in this invention, the apparatus which calculates | requires the film length of the raw fabric roll 15 in use, and outputs it is provided. Specifically, a roll diameter detecting device for calculating the roll diameter, a remaining amount calculating unit 48 for obtaining a predetermined remaining amount such as a film length based on the roll diameter obtained by the roll diameter detecting device, and the A display device 49 such as a CRT or a liquid crystal display for outputting the remaining amount data obtained by the remaining amount calculation unit 48 is provided.
[0041]
First, the material roll diameter detecting device is a first distance measuring device 51 that measures the moving distance of the fed strip-shaped film 16 and a second distance measuring device that measures the length of the arc of the periphery of the rotating shaft 43 that is a rotating body. The apparatus 53 and the roll diameter calculation part 55 which calculates an original fabric roll diameter from the output of each measuring device 51 and 53 are comprised. In practice, the roll diameter calculation unit 55, the speed control device 38, and the remaining amount calculation unit 48 are executed by the CPU, and are therefore incorporated in the same device.
[0042]
As shown in FIG. 2, the second distance measuring device 53 is arranged on the outer peripheral surface of the rotating shaft 43 so as to be opposed to the magnetic material 56 arranged at equal intervals in the circumferential direction with a small gap therebetween. The magnetic force sensor 57 is provided. The magnetic force sensor 57 is supported by a fixed system such as a machine frame, and a detection signal is output each time the magnetic material 56 passes in front of the magnetic force sensor 57. Accordingly, a pulse signal is output from the second distance measuring device 53 (magnetic force sensor 57) along with the rotation of the rotating shaft 43 (original roll 15), and is supplied to the roll diameter calculating unit 55. Since the arrangement interval of the magnetic material 56 is known, when the length of the arc between the adjacent magnetic materials 56 is t0 and the number of output pulses is n, when the belt-like film 16 is sent out by a predetermined length, The length t of the fan arc of the rotating shaft 43 centered on the rotated angle is:
t = n × t0 (1)
Can be calculated.
[0043]
Further, as shown in FIG. 3, the first distance measuring device 51 is attached to a wide receiving roller 51a, a narrow rotating roller 51b, and a rotating roller 51b that are opposed to each other with the belt-like film 16 interposed therebetween. And an encoder 51c. The receiving roller 51a is wider than the belt-like film 16 and comes into contact with the entire surface thereof, and is supported by a bearing (not shown) in a free state so as to be rotatable. On the other hand, the rotating roller 51b is urged toward the receiving roller 51a, and is also supported by a bearing (not shown) in a free state so as to be rotatable.
[0044]
As a result, the receiving roller 51a and the rotating roller 51b are pinched with a predetermined pressure to the belt-like film 16, and the receiving roller 51a and the rotating roller 51b rotate as the belt-like film 16 moves.
[0045]
Since the encoder 51c is attached to the rotating shaft of the rotating roller 51b, a pulse signal is output from the encoder 51c as the rotating roller 51b rotates. The circumference of the rotating roller 51b is known, and the moving distance of the belt-like film 16 is equal to the moving distance of the circumferential surface of the rotating roller 51b, so that the rotating roller 51b is rotated by a unit angle (an angle between adjacent pulses). The moving distance of the belt-like film at the time (reference moving distance T0) is uniquely determined. Therefore, if the pulses output from the encoder (output one pulse per unit angle) are counted and the number of pulses N is counted, the moving distance T at that time is:
T = N × T0 (2)
Is required.
[0046]
Then, the roll diameter calculation unit 55 calculates the following formula (3) from the movement distance T and the arc length t given per unit time, and obtains the original roll diameter R at the start.
R = T * r / t (3)
Where r is the diameter of the rotating shaft 43
That is, as shown in FIG. 4, since both the rotating shaft 43 and the original fabric roll 15 have a circular cross section, the sectors having the same central angle are similar to each other. The ratio of t and T is equal. Therefore, the ratio of arc lengths having the same angle as the diameters r and R as the central angle is also equal. And since the rotating shaft 43 and the original fabric roll 15 are coaxially arrange | positioned and integrated, both rotation angle corresponds. Therefore, the following proportional expression is formed.
[0047]
R: T = r: t (4)
Therefore, when the above equation (4) is solved for R, the above equation (3) is obtained. The length of the arc of the raw roll 15 is the same as the distance T of the drawn strip film 16 measured by the first distance measuring device 51, and the diameter r of the rotating shaft 43 is known in advance. And constant. Therefore, the diameter R of the raw fabric roll 15 at the time of measurement is obtained by substituting the distances measured by the both distance measuring devices 51 and 53 into T and t in the above formula (3). Then, the obtained diameter R is given to the remaining amount calculation unit 48.
[0048]
In this example, the remaining amount calculation unit 48 obtains the remaining film length from the given diameter R, and further determines the remaining time from when the film is pulled out from the raw roll 15 as well as the time in use. By using the raw roll 15, it is possible to obtain the number of products that can be manufactured thereafter.
[0049]
That is, the remaining amount calculation unit 48 is executed in accordance with the flowchart shown in FIG.
[0050]
Then, the remaining film length is obtained based on the acquired data R (ST2). Specifically, first, the following equation (5) is executed to determine the number of turns M. However, d is the film thickness of the film which comprises the raw roll 15 in use, and is given to the remaining amount calculation unit 48 as an initial value in advance.
[0051]
M = ((R−r) / 2) / d (5)
On the other hand, the film diameter of the innermost circumference (first round) is the same as the diameter r of the paper tube 43, and the length of the film wound up in the first round is πr. The film diameter on the second round is the film diameter r on the first round plus two times the film thickness d, and is (r + 2d). The length of the film wound on the second round The length is π (r + 2d). Similarly, the film diameter on the third round is (r + 2 · 2d), and the length of the film wound on the third round is π (r + 2 · 2d). Accordingly, the film diameter on the m-th round is (r + (m−1) · 2d), and the length of the film wound on the third round is π (r + (m−1) · 2d).
[0052]
Therefore, the film length L constituting the roll diameter R of the number M of windings can be obtained by the following equation because the length of each film from the first round to the M stitches can be obtained and summed up.
[0053]

Accordingly, in step 2, after executing the above equation (5), the equation (6) is subjected to arithmetic processing, and the obtained film length L is stored.
[0054]
Next, it is determined whether or not the information desired by the user is the remaining time. If the command given by the user is the remaining time, the process jumps to Step 4 to calculate the remaining time from the film length L obtained in Step 2. The calculated result is output to the display device (ST4, ST5).
[0055]
At this time, the remaining time calculation process is as follows. That is, the speed control device 38 controls each motor so that the moving speed of the belt-like film 16 drawn out from the raw roll 15 becomes the target moving speed V. Therefore, after that, it is assumed that the belt-like film 16 is pulled out at the target moving speed V, and the following equation (7) is executed.
[0056]
Remaining time = L / V (7)
On the other hand, after executing the process of step 5 above, or if the branch determination in step 3 is N, the process jumps to step 6 to check whether the information desired by the user is the number of products that can be manufactured by the original roll. If the command given by the user is the production quantity, the process jumps to step 7 to obtain the production quantity from the film length L obtained in step 2, and outputs the calculation result to the display device (ST7). , ST8).
[0057]
At this time, the manufacturing number calculation process is as follows. That is, the cut dimensions of the packaging machine that is currently in operation (the length L0 of the film required to produce one package) are set as initial data at the start of operation of the packaging machine. It is obtained by substituting the set value L0 and the film length L obtained in step 2 into the following equation (8).
[0058]
Production quantity = L / L0
Then, after executing the process of step 8, or when the branch determination of step 6 is N, the process returns to step 1 to prepare for the next process.
[0059]
In the above-described embodiment, the remaining time and the remaining production quantity can be obtained, and each value can be selectively executed based on a command from the user. However, the present invention is not limited to this. For example, instead of selectively displaying according to a command from the user, both may be calculated and output together. In addition, although both the calculation processes are performed, various changes can be made such that only the output display may be performed in response to an instruction from the user. Further, only one of the remaining time and the number of manufactured pieces may be obtained.
[0060]
Furthermore, the remaining film length obtained in step 2 may be output / displayed. In that case, only the film length may be calculated and output, or it may be output / displayed together with other information or in a selective manner as in the above-described embodiments and modifications. Good.
[0061]
Furthermore, the timing for acquiring information from the sensor and performing each calculation may be always performed at regular intervals, or may be performed after waiting for a command from the user. When the calculation processing is constantly performed, the calculation result may be displayed and output at all times, or the calculation result is always rewritten and stored, and the output to the display device 49 is performed by the user. It may be made to wait for a command / request from, and various methods can be adopted.
[0062]
Further, in the present embodiment, out of the diameters obtained by the roll diameter calculating unit 55, the diameter R0 obtained at the start of operation of the packaging machine is transferred to the speed control device 38. Then, the speed control device 38 initially sets the given raw roll diameter data R0 as the raw roll diameter at the start of operation, and the moving speed of the belt-like film 16 becomes the target speed based on the roll diameter. The rotational speed of the original roll 15 is obtained, the rotational speed of the fourth drive motor 40 is obtained so as to be the same, and the rotational speed is driven at the obtained speed. As a result, the belt-shaped film can be supplied to the packaging machine in a stable state with little error immediately after the start of rotation, and the time until the target value is reached can be shortened.
[0063]
Next, the operation will be described based on the above-described embodiment. First, predetermined variable data such as a film cut dimension, a height / length of an object to be packaged, and a production number per unit time are input to the speed controller 38. And the moving speed (target value) of the strip | belt-shaped film 16 is calculated | required from the said cut size and the manufacture number per unit time. Further, the cut size and the moving speed are also transferred to the remaining amount calculation unit 48 via the speed control device 38.
[0064]
Note that the input of the above data is necessary for the drive control of the entire pillow packaging apparatus, and there is at least the cut size of the film and the number of products manufactured per unit time for the feed method of the roll. That's fine. Alternatively, the moving speed (target value) of the strip film 16 may be directly input without inputting such data.
[0065]
Next, according to a control command from the speed control device 38, the second and fourth drive motors 33 and 40 are rotated by a predetermined amount at a predetermined rotational speed, and then stopped. At this time, the drawing speed of the belt-like film 16 accompanying the rotation of the second drive motor 33 is faster than the sending speed of the belt-like film from the raw roll 15 accompanying the rotation of the fourth driving motor 40. Set to. As a result, the actual moving speed of the belt-like film is slipped by the auxiliary roller 28, the center sealer 29, etc., becomes the feeding speed of the belt-like film based on the fourth driving motor 40 having a slow speed, and the belt-like film is slackened. Move without
[0066]
During this movement, both rollers 51a and 51b of the first distance measuring device 51 also follow and rotate, and accordingly, a predetermined pulse (number of pulses N) is output, and the rotating shaft is synchronized with the rotation of the original roll 15. Each time 43 rotates and the magnetic material 56 passes in front of the magnetic force detector 57, a predetermined pulse (number of pulses n) is output from the second distance measuring device 53.
[0067]
Then, the roll diameter calculation unit 55 executes the above formulas (1) and (2) based on the given n and N, then executes the formula (3), and calculates the raw roll diameter R0. To the speed controller 38. Thereby, the calculation process of the original fabric roll diameter at the beginning is completed.
[0068]
Note that the drive timing (the above-mentioned fixed amount of rotation) of the second and fourth drive motors 33 and 40 that are driven to move the belt-like film during this calculation may be a fixed time, for example, or any pulse number n And or when N exceeds a preset threshold value, an arbitrary value can be set. When threshold processing is performed, both n and N may be compared with the same threshold, or thresholds suitable for each may be set. Further, only one of n or N may be set as a comparison target in advance, and driving may be performed until the value exceeds a certain threshold value, and an arbitrary value can be set.
[0069]
Then, the rotational speed of the auxiliary roller 28 and the center sealer 29, that is, the rotational speed of the second drive motor 33 for driving the auxiliary roller 28 and the center sealer 29 is obtained from the moving speed (target value). Furthermore, the speed control device 38 calculates the initial rotational speed of the fourth drive motor 40 based on the initially set original roll diameter R0 and the moving speed (target value). When the alignment (initial setting) of each part is completed, the second drive motor 33 is driven to rotate at a constant speed at the calculated rotation speed. Further, the first and third drive motors 27 and 35 are also driven to increase / decrease at a predetermined timing, assuming that the belt-like film 16 is conveyed at a moving speed (target value). Further, the fourth drive motor 40 is also rotated based on the calculation result (set to a speed that is slightly slower than the moving speed). Thereby, the drawn strip-shaped film is not slackened up to the bag making machine 18.
[0070]
When the fourth drive motor 40 is driven to rotate, the original roll 15 is also rotated at a predetermined speed, and the belt-like film 16 is delivered from the original roll 15. At the same time, the second drive motor 33 rotates at the same speed and the auxiliary roller 28 and the like that cooperate with the second drive motor 33 rotate at the same speed. The packaged material 20 is supplied to the inside while the bag is formed on the film 19, and the film polymerization end portion is sealed by the center sealer 29 by further proceeding as it is, and the end sealer 30 is sealed and cut in the lateral direction for packaging. The body 34 is manufactured.
[0071]
Further, the feeding speed of the belt-like film 16 during the operation is controlled so as to follow the speed by increasing / decreasing the fourth drive motor 40. Therefore, the belt-like film 16 is sent out at a constant speed by increasing the rotation speed of the fourth drive motor 40 in accordance with the decrease in the winding diameter of the raw roll 15 by the speed control device 38 described above. Moreover, since the speed control is always performed in real time, the rotational speed of the fourth drive motor 40 can be changed smoothly (without a step), so the moving speed of the belt-like film 16 is near the target value. The value is kept almost constant.
[0072]
As described above, in the present embodiment, the roll diameter detecting device (first and second distance measuring devices 51 and 53 and the roll diameter calculating unit 55) which is a part of the device for calculating the remaining amount which is the main part of the present invention. Since the function of detecting the raw roll diameter R0 at the start of operation is added using the, the rotation speed of the fourth drive motor 40 at the start can be set to an optimum value according to the diameter, so at the start To the fourth drive motor 40, the amount of the belt-like film fed from the raw roll and the amount of the belt-like film drawn out by the second drive motor 33 (both per unit time) are maintained in a predetermined relationship. A predetermined tension is applied to the film 16 from the beginning without any excess.
[0073]
Therefore, an overcurrent does not flow through one of the motors, and an unnecessary tension is not applied to the strip film, and the packaging process can be performed in a desired state. And since the roll roll diameter is detected each time it is started, the packaging device is stopped for other reasons at the end of work, maintenance, etc., and then restarted or the roll roll in use is mounted. The device can be reliably operated in a desired state even when the exact diameter is unknown so that the raw roll diameter is smaller than that of the unused roll.
[0074]
In the present embodiment, a large facility such as a braking device is not required, and only a non-bulky member such as the pulley 17 exists between the raw fabric roll 15 and the bag making device 18. Therefore, it is possible to reduce the size of the packaged packaging apparatus as a whole and to reduce the size.
[0075]
As described above, when the normal packaging machine is in operation, the belt-like film 16 is stably fed out, and the package is manufactured under the initially set conditions. Here, in the present invention, for example, when the roll diameter of the raw fabric roll 15 in use is getting smaller and the time for replacement is approaching, the user who performs the replacement process has the remaining time via an input device (not shown). Enter the display command.
[0076]
Then, based on the current roll diameter R obtained by the roll diameter calculation unit 55, the remaining amount calculation unit 48 sequentially executes the processing from step 1 to step 5 to obtain the remaining time, and displays it on the display device 49. Output to. Then, the user confirms the remaining time, and if it is relatively short, the user waits on the spot, and waits for all of the belt-shaped film to be pulled out from the used roll, and then replaces it with the next roll. On the other hand, when the remaining time is comparatively harmful, the user once leaves the place and performs other work, and returns to the side of the packaging machine again when the replacement time comes, and performs the replacement process. Since the remaining time is known in this way, there is no wasted time and work / processing according to the remaining time can be performed, so that productivity is improved.
[0077]
In addition, based on the relationship between the remaining time and the end time or the scheduled operation stop time of the packaging machine, the roll roll currently in use or the spare roll already prepared (taken by the packaging machine) It is determined whether or not the roll is sufficient. If the roll is insufficient, the necessary number of rolls can be brought. As a result, the fabric roll can be temporarily stored near the packaging machine without excess or deficiency, and re-transfer processing to the storage location after completion by bringing it more than necessary becomes unnecessary, and work efficiency is improved.
[0078]
On the other hand, when the required number of productions is given for the same package that is manufactured with the raw roll currently in use, the user can display the remaining number of productions via an input device (not shown). Enter an instruction.
[0079]
Then, based on the roll diameter R at that time obtained by the roll diameter calculation unit 55, the remaining amount calculation unit 48 sequentially executes the processes of steps 1, 2, 6, and 7 to determine the remaining production quantity that can be manufactured. It is obtained and output to the display device 49. Then, the user confirms the number of products to be manufactured, determines whether or not the number of packages required by the currently used fabric roll can be produced, and if not, brings the fabric roll. deep. On the other hand, if it is enough, the place is once moved away from the place, etc., and after returning to the packaging machine after a predetermined time has passed, the required number of packages are manufactured. That is, there is no original fabric roll, and there is no possibility of temporary stop due to inability to manufacture.
[0080]
In the above-described embodiment, the first and third drive motors 27 and 35 are respectively accelerated and decelerated at a predetermined timing. However, the present invention is not limited to this, and the first drive motor 27 is not limited thereto. May rotate at a constant speed. That is, in the embodiment, when the packaged object 20 is supplied to the packaging machine 18, the packaged object 20 is moved at the same speed as the cylindrical film 19 that is in contact therewith. If the contact resistance due to the difference in speed does not break down, by rotating the first drive motor 27 at a constant speed as described above, the conveyance speed of the package supply device 22 is made constant, The control system can be simplified.
[0081]
The means for detecting the arc length of the raw roll is not limited to the above-described embodiment. For example, as shown in FIG. 6, a rotary roller 51a with an encoder is provided as in the second distance measuring device. The outer peripheral surface of the rotating shaft 43 may be brought into contact with a predetermined pressure, and may be rotatably held so as to follow the rotation of the rotating shaft 43 and rotate. Thereby, when the rotating shaft 43 rotates, the number of pulses corresponding to the moving distance (arc length) of the outer peripheral surface of the rotating shaft 43 is sent to the roll diameter calculation unit, and the same measurement principle as the first distance measuring device According to the above, the arc length is obtained.
[0082]
The arc length to be measured in the present invention may be obtained by specific numerical values (Xcm, Ymm, etc.) as in the above embodiments, but the encoder is not calculated without calculating such specific numerical values. This also includes a value corresponding to the length such as the number of pulses output from the same, and the same applies to the measurement of the moving distance of the film. In such a case, calculation processing based on proportionality is also executed in the state of indirect data such as the number of pulses.
[0083]
In the modified example and the above-described embodiment, the rotating shaft 43 on which the raw roll 15 is mounted is a rotating body (the rotating shaft and the rotating body are combined), and the arc length of the outer peripheral surface is measured. However, the present invention is not limited to this, and it is of course possible to separately attach a disc-like rotating body to the rotating shaft 43 and measure the arc length of the rotating body.
[0084]
In the embodiment described above, an example in which the packaging machine to be mounted is applied to a horizontal pillow packaging apparatus in the above-described embodiment is described. However, a packaging film used for a vertical pillow packaging apparatus, a horizontal three-way packaging apparatus, a four-way packaging apparatus, or the like. Can be applied to various packaging machines as long as it is continuously drawn from the raw roll.
[0085]
【The invention's effect】
As described above, in the packaging machine according to the present invention, information on the remaining amount of the raw fabric roll currently in use can be known. Therefore, when the remaining amount of data is the remaining time, there is no need to stand by the packaging machine even when the diameter of the roll becomes smaller, and processing corresponding to the remaining time is performed in another place. be able to. Therefore, productivity in the whole factory improves. On the other hand, it is possible to return to the packaging machine before all the belt-shaped film is pulled out from the original fabric roll, so that there is no time for the packaging machine to be temporarily stopped due to the absence of the belt-shaped film to be supplied. As a result, the operating efficiency of the packaging machine is improved.
[0086]
In addition, when the remaining amount data is the film length or the number of manufactured pieces, it is possible to easily and accurately determine whether or not the required number of packages can be manufactured with the raw roll being used. Anti-rolls can be prepared without excess and deficiency, and wasteful labor due to the movement of extra raw rolls can be reduced.
[0087]
Furthermore, since the data regarding the remaining amount described above is performed based on the roll diameter of the raw roll, it may be a raw roll in use or may not be constantly monitored from the beginning of use. In addition, versatility is improved.
[0088]
  And claims5Thus, in the control after the start of operation, the feeding of the belt-like film can be controlled on the side of the original roll, so that when the drive motor is decelerated, the rotational speed of the original roll increases and decelerates accordingly. Stopping can also stop the rotation of the roll. Therefore, the original fabric roll does not continue to rotate due to the inertial force as in the prior art, and a large braking device for the original fabric roll becomes unnecessary.
[0089]
Then, when the rotation of the drive motor is gradually increased at a predetermined ratio in accordance with the decrease in the raw roll diameter accompanying the feeding of the strip film, the strip film can be fed at a constant speed.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a packaging machine according to the present invention.
FIG. 2 is a partially enlarged cross-sectional view showing the vicinity of an original fabric roll which is a main part of the present embodiment.
FIG. 3 is a partially enlarged cross-sectional view showing a first distance measuring device which is a main part of the present embodiment.
FIG. 4 is a diagram for explaining an operation principle of the present embodiment.
FIG. 5 is a flowchart illustrating a function of a remaining amount calculation unit.
FIG. 6 is a diagram showing another embodiment of the second distance measuring device.
FIG. 7 is a diagram showing a conventional technique.
[Explanation of symbols]
15 Raw roll
16 Strip film
28 Auxiliary roller (supplying means)
29 Center sealer (means to supply)
33 Second drive motor (supplying means)
38 Speed control device (control means)
40 Fourth drive motor (drive motor)
48 Remaining amount calculation unit (remaining amount calculation means)
49 Display device (output device)
51 1st distance measuring device (roll diameter detection means)
53 Second distance measuring device (roll diameter detecting means)
55 Roll diameter calculation part (roll diameter detection means)

Claims (5)

In a packaging machine that wraps an article to be packaged that is conveyed at predetermined intervals using a belt-like film continuously fed from an original fabric roll, and seals and / or cuts a predetermined portion of the film to produce a package. ,
Roll diameter detecting means for detecting the roll diameter of the raw roll,
A remaining amount calculating means for obtaining a remaining amount of the belt-shaped film wound around the raw roll based on the roll diameter detected by the roll diameter detecting means;
An output device that outputs a calculation result by the remaining amount calculation means,
The roll diameter detecting means is
A first distance measuring device that directly or indirectly measures the moving distance of the belt-like film sent out by the rotation of the original fabric roll;
A second distance measuring device that directly or indirectly measures the length of an arc of a rotating body that rotates in synchronization with the original fabric roll;
A packaging machine including a roll diameter calculation unit that receives movement distance data and arc length data respectively measured by the first and second distance measuring devices and calculates an original roll diameter based on the output .  The packaging machine according to claim 1, wherein the remaining amount is a film length.  The packaging machine according to claim 1, wherein the remaining amount is a remaining time.  The packaging machine according to claim 1, wherein the remaining amount is a remaining production number.  A drive motor capable of acceleration / deceleration control that applies a rotational force to the rotating shaft on which the original roll is mounted, and the drive motor is controlled so that the moving speed of the belt-shaped film fed from the original roll becomes a predetermined speed. The packaging machine of any one of Claims 1-4 provided with the control means to do.

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